Split the BMP280 / BME280 driver into common code and create I2C and
SPI attachments.

A driver for the Bosch BMP280 / BME280 temperature, humidity and
atmospheric pressure sensor. This is an inexpensive to moderately
expensive chip available from a large number of places. The driver
supports all aspects of the two chips, except for the repeating read
mode which would allow for sub-second queries, such as fall detection
or perhaps even as an altimeter. This driver also only supports the
I2C interface and not the SPI interface.

The BME280, the one with humidity, is not fully tested at this point,
awaiting upon a breakout board and may not show proper humidity.

A driver for the Aosong AHT20 temperature and humidity sensor. While
slow for an I2C sensor it is inexpensive and should work well enough
in most indoor conditions. All features of the chip are supported.

drm: Use CPPFLAGS.drmkms in all local drm drivers too.

This way we don't pollute the NetBSD kernel namespace with all the
Linux compat shim definitions needed to build drm, except for the
local drm drivers that need the API.

Re-factor and overhaul the "mcp23s17gpio" driver as "mcpgpio", and
add support for 8-bit and I2C variants of the chip:
- MCP23008 / MCP23S08: 8-bit (I2C / SPI)
- MCP23017 / MCP23S17: 16-bit (I2C / SPI)
- MCP23018 / MCP23S18: 16-bit (I2C / SPI), open-drain outputs

The MCP23x17 and MCP23x18 are essentially identical, software-wise; we
merely report different GPIO pin capabilities (no push-pull output for
MCP23x18). Also, remove the tri-state capability that was previously
advertised by the old version of this driver; these chips have no way
to put the pin into a HI-Z mode.

All 3 I2C versions are supported, but the SPI front-end still only
supports the MCP23S17 for now (SPI autoconfiguration needs an overhaul).

mcp23s17gpio(4) remains present as a link to the new mcpgpio(4) man page.

XXX Still to-do: FDT integration, interrupt suppoort.

fix few typos in comments.

A driver and user land utility for the Sparkfun Serial Controlled Motor
Driver module as illustrated here:

https://www.sparkfun.com/products/13911

A SCMD module is a ARM SOC simular to a Arduino in front of a motor
driver chip. The single SCMD module can control two motors and up to
16 additional modules can be chained together using an internal I2C
bus. One can interface with the SCMD using tty uart commands, SPI or
I2C. The driver in this commit adds a kernel driver for the I2C and
SPI interfaces. The command line utility provides a set of
convenience commands that support most of the functions of the SCMD
and is able to use the tty uart mode, SPI user land or the included
kernel driver in a uniform manor.

The use of the SCMD module is mostly for small robots and the like,
but it can control anything that is controllable by voltage.

Driver for the Sensirion SHT30/SHT31/SHT35 temperature and humidity
sensor such as:

https://www.adafruit.com/product/2857

This is a higher priced sensor with a lot of features, including the
ability to do sub-second periodic updates. The driver supports
everything about the sensor except for the alert pin.

A driver for the Sensirion SGP40 MOx gas sensor. An example of this
chip from Adafruit is:

https://www.adafruit.com/product/4829

This is a moderately priced gas sensor that can detect volatile
organic compounds in the air. The driver uses the 3-clause BSD
licensed VOC algorithm provided by Sensirion to turn the raw sensor
metric into a VOC index which can indicate the quality of the air in a
particular indoor environment. All published functions of the chip
are supported and one unpublished feature.

A driver for the Sensirion SHT40/SHT41/SHT45 temperature and humidity
sensor. An example of this chip is:

https://www.adafruit.com/product/4885

This is a lower cost chip that provides higher then usual precision
according to the data sheet. This driver supports all of the published
functions that the chip has.

branches: 1.116.6;
move the fcu driver into arch/macppc where it belongs

branches: 1.115.4;
Rename tsl256x.c -> tsllux.c. No other changes are made by this commit.

Add a driver for NXP PCA954x / PCA984x I2C switch / mux controllers.

Re-factor the "iicmux" driver to support other types of muxes that are
themselves i2c devices.

branches: 1.112.2;
Add a driver for the PCF8574 I/O expander, used as a GPIO in some sparc64
hardware.
The driver currently handles pins configured as LED or INDICATOR and adds
them to the LED and sysmon_envsys subsystems, respectively.

a very preliminary driver for the acclerometer found in later *Books
register definitions from OpenBSD

branches: 1.110.4;
attach LEDs according to info passed as device properties

the beginning of a driver for Philips Semiconductors PCA 9555 and 9556
GPIO controllers, found in Sun Fire v210 and some G5 macs.
Only prints configuration and line status so far.

Clean up gttwsi's register access stuff:
- Garbage-collect the obsolete GTTWSI_ALLWINNER option; it hasn't been
needed since FDT'ization of the Allwinner support code.
- Redefine thw "TWSI_*" register definitions to clearly call out:
-> The Marvell flavor of the offsets
-> The Allwinner flavor of the offsets
...and make the regular definitions indices into a register map.
- Pass the appropriate register map from the front-end to the core.
- Remove the customer register read/write callbacks -- they are no longer
needed now that each front-end passes an appropriate register map to
the core.

branches: 1.107.2;
Add driver for CellWise CW2015 Fuel Gauge IC.

Eliminate all of the #ifdefs for the "strtc" driver. Define model
properties (similar to what the "dsrtc" driver does), and provide
DT compat strings corresponding to those models. Allow config flags
to specify the model for non-FDT platforms (also like "dsrtc").

Add driver for Everest Semi ES8316 Low Power Audio CODEC

Add driver for NXP TDA19988 HDMI encoder

Remove tps65950pm (hardware now supported by twl4030.c)

Add driver for TI TWL4030 Power Management IC

Add FDT support

branches: 1.100.2;
Add a driver for the NXP PCA9685 16-channel, 12-bit PWM Fm+ LED controller.

add i2c attachment for ssdfb

Add basic support for Analogix eDP transmitters. This driver doesn't
know how to mode set yet -- it only knows how to read EDID from a panel.

add options DSRTC_YEAR_START_2K for machines which use 2000 and not 1970
as base to count years from, like Iyonix.
While there apply the offset when writing to the clock as well.

Add driver for Rockchip RK808 Power Management IC.

Add driver for Silergy SY827/SY828 step down regulator.

Add TEA5767 FM radio driver. From Karuna Grewal.

branches: 1.93.2;
Remove the i2c "size" locator and corresponding property / attach arg.
It was a hack meant only for EEPROMs, which have another way to specify
size in the config directive ("flag" paramter), as well as a better way
to detect size based on "compatible" string.

Add a driver for the Taos TSL256x light sensors.

axppmic depends on sysmon_envsys

Rename axp806pmic to axppmic, and add support for AXP803.

Add support for poweroff and the power on-off key (POK).

FDT-ize X-Powers AXP805/806 PMIC driver.

implement fan control, get calibration data from EEPROM via uni_n

yet another temperature sensor / ADC
this one supports Analog Devices AD7417, found in some G5 macs
depends on OpenFirmware for calibration data

preliminary driver for the fan control unit found in some G5

branches: 1.84.2;
Delete 'define dbcool {}' line commented out in previous. It's bogus
and the gcc6 correctly complains about that when it compiles ioconf.c

PR toolchain/53023

Disable the 'define dbcool {}' line - it's not needed, and causes
problems with config(1) and gcc6. See PR toolchain/530223 for more
info.

add driver for Maxim DS1631 High-Precision Digital Thermometer and Thermostat
temperature reading only for now

Driver for EM Microelectronic EM3027 RTC and temperature sensor.

PR/52848: Brad Spencer: Two environment sensor drivers: AM2315 and SI70xx
XXX: Please check that my refactoring did not break them!

Add drivers for HID over I2C devices, and a driver for I2C mices.
From OpenBSD.

Hook axp20x into fdt regulator api

Add driver for Silergy SY8106A regulator

Add GPIO drivers for MAX77620 and TCA9539 as found in Jetson TX1

Instead of a Linux keymap, convert Linux event codes to USB scan codes and
use the ukbd keymaps instead.

Add driver for Texas Instruments TCA8418 I2C Controller Keypad Scan IC.

branches: 1.73.4;
Add LDO6 regulator support.

branches: 1.72.2;
Add 'needs-flag' to tps65217pmic.

For built-in modules, the iic driver requires i2c_bitbang

Create separate modules for i2c_bitbang and bpf_filter so these files
can be included in kernels which need them without also duplicating
them in other modules. Removes the duplicate symbols I found which
prevented loading i2c and bpf modules after having fixed PR 45125.

Add a driver for the ADM1026 Thermal System Management Fan Controller
i2c chip.

add sysmon_wdog dependency to as3722pmic

Add basic driver for AMS AS3722 power management IC

needs-flag for axp20x

Add driver for Texas Instruments TMP451 Temperature Sensor

pcf8653 driver is compatible, delete this driver

add Haoyu Microelectronic HYM8563 RTC driver

Add driver for Active-Semi ACT8846 Power Management controller.

Add driver for X-Powers AC100 integrated audio codec and RTC subsystem.
Only RTC functionality implemented for now.

Add AXP806 and AXP809 power management controller drivers.

Let kernel config override I2C_MAX_ADDR

branches: 1.58.2;
dsrtc depends on sysmon_envsys.

add AXP22x Power Management Unit driver

AXP20x Power Management Unit driver, pretty basic at the moment -- only acts as a temperature sensor

AllWinner implementation uses a different register layout, select it with options GTTWSI_ALLWINNER

branches: 1.54.2;
add HYT-221/271/939 humidity/temperature I2C sensor
extend envsys(4) framework by %rH (relative humidity)

branches: 1.53.2;
Add lmenv to the configuration framework.

Preliminary support for MPL115A2 pressure sensor. It works, but accurracy is
awful.

I should add presure as a new type of sensor to envsys at some point...

Make gttswi MI and usuable from non-Marvell SoCs.
(should rename to mvi2c but ...)

Add driver for Nuvoton W83795G voltage/temp/fan/gpio monitoring device.

As used in the HP Microserver N36L/N40L/N54L:

w83795g* at iic? addr 0x2f
gpio* at gpiobus?

Note that the gpio and watchdog functionality appears to be useless on
the Microserver, as the gpio pins don't affect the LED's and a watchdog
trigger does not cause a reset. Perhaps the reset pin just isn't wired.

There are quite flexible fan control options as well as just monitoring,
but it is not clear to me how best to export that function to userspace.

branches: 1.49.2; 1.49.4;
Add driver for Microchip MCP9800/1/2/3 temperature sensors.

Add minimal support for TPS65217 PMIC as found on BeagleBone. Next step is to
expose regulated voltages through envsys(4).

add support for TPS65950 watchdog timer

TI TPS65950 driver, right now about all it can do is control LEDs

branches: 1.45.6; 1.45.10;
remove Xbox support

branches: 1.44.2;
fix build for kernels with i2c host controller drivers but no iic(4)
driver present

Install dev/i2c/i2c_io.h and implement the API in the iic(4) driver.
Obsolete the I2C_SCAN option as this can now be done from userland.

lg3303 depends on dtv_math, not xc3028

modify the dtv device api so hardware drivers can be loaded independently
of the dtv module

Add Conexant/Samsung CX24227/S5H1409 demodulator subroutines.

Add subroutines to support Microtune MT2131 silicon tuner.

nxt2k depends on firmload

add LGDT3303 tuner and XC3028L demod drivers

Add subdriver for Nextwave (subsequently acquired by ATI, then AMD, and
finally Broadcom) NXT200x series of 8VSB/QAM demodulator.

Still a bit crude and only supports the NXT2004 at this point.

Add subdriver for generic PLL-based TV tuners.

s390rtc(4), an RTC driver for the Seiko Instruments S-35390A chip.

Initial implementation of ibmhawk(4) driver for sensors behind the IBM Hawk
on-board Integrated Systems Management Processor found on some eServers.

Tested on an IBM eServer x335.

Add pcf8563rtc(4), yet another I2C real time clock.

branches: 1.31.2; 1.31.4;
Add a generic Motorola/Freescale i2c driver. This was taken from sandpoint
and heavily modified. It works on most Freescale PowerPC and ARM SoCs.

add au8522, xc5k, auvitek config glue

Add options STRTC_NO_USERRAM and STRTC_NO_WATCHDOG for m41t80.

Add G760a fan speed controller driver.

Split spdmem driver into a bus attachment and a common back-end
probe and ROM decode, to follow similar changes made in OpenBSD:

http://article.gmane.org/gmane.os.openbsd.cvs/94948
http://article.gmane.org/gmane.os.openbsd.cvs/94956

There exists at least one alternative attachment (for SGI IP35
systems; see http://article.gmane.org/gmane.os.openbsd.cvs/94947),
and there could be more in the future.

Thanks to Christoph Egger for pointing out the OpenBSD activity.

branches: 1.26.2;
Import smcsmon(4) driver for SMSC LPC47M192 hardware monitor

From Takahiro HAYASHI in PR kern/40420

branches: 1.25.2;
Ooops - sdtemp(4) driver requires sysmon.

Initial implementation of sdtemp(4) driver for on-DIMM temp sensor.

(These optional sensors are specified by JEDEC Standard No. 21-C
Section 4-7 and implemented by multiple vendors. Tested on my
amd64 machine with Kingston KVR1066D3E7S/2G memory which includes
a STMicro STTS424E02 sensor.)

branches: 1.23.6; 1.23.10; 1.23.14;
Add dependency on sysmon_envsys to admtemp.

Ported alipm(4) and admtemp(4) from OpenBSD.

branches: 1.21.2;
Add an i2c attachment for the LM78 family of temp sensor/fan control

Tested by Martin Husemann

Remove chip-specific drivers for ADT7463, ADT7467, and ADM1030; these
have been superseded by the dbcool(4) driver.

Add new driver for dbCool(tm) family of Thermal Monitor and Fan Controller.
Supported chips: ADM1027, ADM1030, ADT7463, ADT7466, ADT7467, ADT7468,
ADT7473, ADT7475, and ADT7476. Notably missing is the ADT7490, and fan
controller support on the ADT7466 is still on the to-do list.

Tested by myself and njoly@
Reviewed by garbled@
Commit approved by christos@, bouyer@, cube@, and matt@

Provide an option I2C_SCAN to enable sanning i2c bus for responses. This
is disabled by default, preserving current behavior.

OK garbled@

allow wildcard for addr so we can have spdmem* at iic? addr ?

branches: 1.16.20; 1.16.24; 1.16.26; 1.16.30;
defflag DEBUG_SGSMIX

branches: 1.15.2;
Add spdmem(4) driver. This decodes technical specifications stored in
the eeprom on common types of memory modules. The specifications are
displayed during boot and can later be queried in the hw.spdmemN sysctl
subtree. Stub driver written by Nicolas Joly and greatly improved upon by
Paul Goyette. From PR 36745, with additional improvements by Paul and me.

branches: 1.14.6; 1.14.14; 1.14.18;
add sgsmix

Provide external functions for setting the LED, rebooting, and powering off
the system.

Microsoft Xbox serial EEPROM driver. Currently reports the system serial
number as sysctl machdep.xbox_serial.

Driver for the Xbox System Management Controller. Currently reports CPU and
motherboard temperatures, but will eventually be extended to replace
arch/i386/xbox/pic16l.S

branches: 1.10.8; 1.10.16;
Oops! ddc.c was accidentally getting included in *all* kernel configs.
Added a new define so it can be included without doing the attach dance.

Add basic DDC (VESA Data Display Channel) driver for use by framebuffers.
Reviewed by jmcneill@ and macallan@.

branches: 1.8.2; 1.8.4;
Add r2025rtc.

branches: 1.7.2;
Add support for i2c bus on AMD-8111 used on many Opteron server motherboards,
and ADT 7463c thermal and voltage monitor found on the Tyan S2881 and S2882-D
(and probably other boards as well). We do not currently support any kind
of detection of the i2c address of the thermal monitor; it appears to be
at 0x2D on the S2881 and 0x2E on the S2882-D (kernel config examples
forthcoming).

From PR kern/32463 submitted by Anil Gopinath, anil_public@yahoo.com.

branches: 1.6.2; 1.6.4; 1.6.6;
merge ktrace-lwp.

Added RICOH RS5C372[AB] Real Time Clock.

added drivers for Analog Devices ADT7467 and ADM1030 thermal monitor / fan controller chips found in various Apple laptops and probably other machines.

branches: 1.3.4; 1.3.16; 1.3.18;
As suggested by Jason Thorpe, rename m41t to m41trtc.

Add xrtc device for XICOR X1226 RTC.

New generic I2C framework. Supports bit-bang and "intelligent" I2C
interface controllers (of varying intelligence levels).

Contributed by Wasabi Systems, Inc. Primarily written by Steve Woodford,
with some modification by me.

A driver for the Bosch BMP280 / BME280 temperature, humidity and
atmospheric pressure sensor. This is an inexpensive to moderately
expensive chip available from a large number of places. The driver
supports all aspects of the two chips, except for the repeating read
mode which would allow for sub-second queries, such as fall detection
or perhaps even as an altimeter. This driver also only supports the
I2C interface and not the SPI interface.

The BME280, the one with humidity, is not fully tested at this point,
awaiting upon a breakout board and may not show proper humidity.

A driver for the Aosong AHT20 temperature and humidity sensor. While
slow for an I2C sensor it is inexpensive and should work well enough
in most indoor conditions. All features of the chip are supported.

drm: Use CPPFLAGS.drmkms in all local drm drivers too.

This way we don't pollute the NetBSD kernel namespace with all the
Linux compat shim definitions needed to build drm, except for the
local drm drivers that need the API.

Re-factor and overhaul the "mcp23s17gpio" driver as "mcpgpio", and
add support for 8-bit and I2C variants of the chip:
- MCP23008 / MCP23S08: 8-bit (I2C / SPI)
- MCP23017 / MCP23S17: 16-bit (I2C / SPI)
- MCP23018 / MCP23S18: 16-bit (I2C / SPI), open-drain outputs

The MCP23x17 and MCP23x18 are essentially identical, software-wise; we
merely report different GPIO pin capabilities (no push-pull output for
MCP23x18). Also, remove the tri-state capability that was previously
advertised by the old version of this driver; these chips have no way
to put the pin into a HI-Z mode.

All 3 I2C versions are supported, but the SPI front-end still only
supports the MCP23S17 for now (SPI autoconfiguration needs an overhaul).

mcp23s17gpio(4) remains present as a link to the new mcpgpio(4) man page.

XXX Still to-do: FDT integration, interrupt suppoort.

fix few typos in comments.

A driver and user land utility for the Sparkfun Serial Controlled Motor
Driver module as illustrated here:

https://www.sparkfun.com/products/13911

A SCMD module is a ARM SOC simular to a Arduino in front of a motor
driver chip. The single SCMD module can control two motors and up to
16 additional modules can be chained together using an internal I2C
bus. One can interface with the SCMD using tty uart commands, SPI or
I2C. The driver in this commit adds a kernel driver for the I2C and
SPI interfaces. The command line utility provides a set of
convenience commands that support most of the functions of the SCMD
and is able to use the tty uart mode, SPI user land or the included
kernel driver in a uniform manor.

The use of the SCMD module is mostly for small robots and the like,
but it can control anything that is controllable by voltage.

Driver for the Sensirion SHT30/SHT31/SHT35 temperature and humidity
sensor such as:

https://www.adafruit.com/product/2857

This is a higher priced sensor with a lot of features, including the
ability to do sub-second periodic updates. The driver supports
everything about the sensor except for the alert pin.

A driver for the Sensirion SGP40 MOx gas sensor. An example of this
chip from Adafruit is:

https://www.adafruit.com/product/4829

This is a moderately priced gas sensor that can detect volatile
organic compounds in the air. The driver uses the 3-clause BSD
licensed VOC algorithm provided by Sensirion to turn the raw sensor
metric into a VOC index which can indicate the quality of the air in a
particular indoor environment. All published functions of the chip
are supported and one unpublished feature.

A driver for the Sensirion SHT40/SHT41/SHT45 temperature and humidity
sensor. An example of this chip is:

https://www.adafruit.com/product/4885

This is a lower cost chip that provides higher then usual precision
according to the data sheet. This driver supports all of the published
functions that the chip has.

branches: 1.116.6;
move the fcu driver into arch/macppc where it belongs

branches: 1.115.4;
Rename tsl256x.c -> tsllux.c. No other changes are made by this commit.

Add a driver for NXP PCA954x / PCA984x I2C switch / mux controllers.

Re-factor the "iicmux" driver to support other types of muxes that are
themselves i2c devices.

branches: 1.112.2;
Add a driver for the PCF8574 I/O expander, used as a GPIO in some sparc64
hardware.
The driver currently handles pins configured as LED or INDICATOR and adds
them to the LED and sysmon_envsys subsystems, respectively.

a very preliminary driver for the acclerometer found in later *Books
register definitions from OpenBSD

branches: 1.110.4;
attach LEDs according to info passed as device properties

the beginning of a driver for Philips Semiconductors PCA 9555 and 9556
GPIO controllers, found in Sun Fire v210 and some G5 macs.
Only prints configuration and line status so far.

Clean up gttwsi's register access stuff:
- Garbage-collect the obsolete GTTWSI_ALLWINNER option; it hasn't been
needed since FDT'ization of the Allwinner support code.
- Redefine thw "TWSI_*" register definitions to clearly call out:
-> The Marvell flavor of the offsets
-> The Allwinner flavor of the offsets
...and make the regular definitions indices into a register map.
- Pass the appropriate register map from the front-end to the core.
- Remove the customer register read/write callbacks -- they are no longer
needed now that each front-end passes an appropriate register map to
the core.

branches: 1.107.2;
Add driver for CellWise CW2015 Fuel Gauge IC.

Eliminate all of the #ifdefs for the "strtc" driver. Define model
properties (similar to what the "dsrtc" driver does), and provide
DT compat strings corresponding to those models. Allow config flags
to specify the model for non-FDT platforms (also like "dsrtc").

Add driver for Everest Semi ES8316 Low Power Audio CODEC

Add driver for NXP TDA19988 HDMI encoder

Remove tps65950pm (hardware now supported by twl4030.c)

Add driver for TI TWL4030 Power Management IC

Add FDT support

branches: 1.100.2;
Add a driver for the NXP PCA9685 16-channel, 12-bit PWM Fm+ LED controller.

add i2c attachment for ssdfb

Add basic support for Analogix eDP transmitters. This driver doesn't
know how to mode set yet -- it only knows how to read EDID from a panel.

add options DSRTC_YEAR_START_2K for machines which use 2000 and not 1970
as base to count years from, like Iyonix.
While there apply the offset when writing to the clock as well.

Add driver for Rockchip RK808 Power Management IC.

Add driver for Silergy SY827/SY828 step down regulator.

Add TEA5767 FM radio driver. From Karuna Grewal.

branches: 1.93.2;
Remove the i2c "size" locator and corresponding property / attach arg.
It was a hack meant only for EEPROMs, which have another way to specify
size in the config directive ("flag" paramter), as well as a better way
to detect size based on "compatible" string.

Add a driver for the Taos TSL256x light sensors.

axppmic depends on sysmon_envsys

Rename axp806pmic to axppmic, and add support for AXP803.

Add support for poweroff and the power on-off key (POK).

FDT-ize X-Powers AXP805/806 PMIC driver.

implement fan control, get calibration data from EEPROM via uni_n

yet another temperature sensor / ADC
this one supports Analog Devices AD7417, found in some G5 macs
depends on OpenFirmware for calibration data

preliminary driver for the fan control unit found in some G5

branches: 1.84.2;
Delete 'define dbcool {}' line commented out in previous. It's bogus
and the gcc6 correctly complains about that when it compiles ioconf.c

PR toolchain/53023

Disable the 'define dbcool {}' line - it's not needed, and causes
problems with config(1) and gcc6. See PR toolchain/530223 for more
info.

add driver for Maxim DS1631 High-Precision Digital Thermometer and Thermostat
temperature reading only for now

Driver for EM Microelectronic EM3027 RTC and temperature sensor.

PR/52848: Brad Spencer: Two environment sensor drivers: AM2315 and SI70xx
XXX: Please check that my refactoring did not break them!

Add drivers for HID over I2C devices, and a driver for I2C mices.
From OpenBSD.

Hook axp20x into fdt regulator api

Add driver for Silergy SY8106A regulator

Add GPIO drivers for MAX77620 and TCA9539 as found in Jetson TX1

Instead of a Linux keymap, convert Linux event codes to USB scan codes and
use the ukbd keymaps instead.

Add driver for Texas Instruments TCA8418 I2C Controller Keypad Scan IC.

branches: 1.73.4;
Add LDO6 regulator support.

branches: 1.72.2;
Add 'needs-flag' to tps65217pmic.

For built-in modules, the iic driver requires i2c_bitbang

Create separate modules for i2c_bitbang and bpf_filter so these files
can be included in kernels which need them without also duplicating
them in other modules. Removes the duplicate symbols I found which
prevented loading i2c and bpf modules after having fixed PR 45125.

Add a driver for the ADM1026 Thermal System Management Fan Controller
i2c chip.

add sysmon_wdog dependency to as3722pmic

Add basic driver for AMS AS3722 power management IC

needs-flag for axp20x

Add driver for Texas Instruments TMP451 Temperature Sensor

pcf8653 driver is compatible, delete this driver

add Haoyu Microelectronic HYM8563 RTC driver

Add driver for Active-Semi ACT8846 Power Management controller.

Add driver for X-Powers AC100 integrated audio codec and RTC subsystem.
Only RTC functionality implemented for now.

Add AXP806 and AXP809 power management controller drivers.

Let kernel config override I2C_MAX_ADDR

branches: 1.58.2;
dsrtc depends on sysmon_envsys.

add AXP22x Power Management Unit driver

AXP20x Power Management Unit driver, pretty basic at the moment -- only acts as a temperature sensor

AllWinner implementation uses a different register layout, select it with options GTTWSI_ALLWINNER

branches: 1.54.2;
add HYT-221/271/939 humidity/temperature I2C sensor
extend envsys(4) framework by %rH (relative humidity)

branches: 1.53.2;
Add lmenv to the configuration framework.

Preliminary support for MPL115A2 pressure sensor. It works, but accurracy is
awful.

I should add presure as a new type of sensor to envsys at some point...

Make gttswi MI and usuable from non-Marvell SoCs.
(should rename to mvi2c but ...)

Add driver for Nuvoton W83795G voltage/temp/fan/gpio monitoring device.

As used in the HP Microserver N36L/N40L/N54L:

w83795g* at iic? addr 0x2f
gpio* at gpiobus?

Note that the gpio and watchdog functionality appears to be useless on
the Microserver, as the gpio pins don't affect the LED's and a watchdog
trigger does not cause a reset. Perhaps the reset pin just isn't wired.

There are quite flexible fan control options as well as just monitoring,
but it is not clear to me how best to export that function to userspace.

branches: 1.49.2; 1.49.4;
Add driver for Microchip MCP9800/1/2/3 temperature sensors.

Add minimal support for TPS65217 PMIC as found on BeagleBone. Next step is to
expose regulated voltages through envsys(4).

add support for TPS65950 watchdog timer

TI TPS65950 driver, right now about all it can do is control LEDs

branches: 1.45.6; 1.45.10;
remove Xbox support

branches: 1.44.2;
fix build for kernels with i2c host controller drivers but no iic(4)
driver present

Install dev/i2c/i2c_io.h and implement the API in the iic(4) driver.
Obsolete the I2C_SCAN option as this can now be done from userland.

lg3303 depends on dtv_math, not xc3028

modify the dtv device api so hardware drivers can be loaded independently
of the dtv module

Add Conexant/Samsung CX24227/S5H1409 demodulator subroutines.

Add subroutines to support Microtune MT2131 silicon tuner.

nxt2k depends on firmload

add LGDT3303 tuner and XC3028L demod drivers

Add subdriver for Nextwave (subsequently acquired by ATI, then AMD, and
finally Broadcom) NXT200x series of 8VSB/QAM demodulator.

Still a bit crude and only supports the NXT2004 at this point.

Add subdriver for generic PLL-based TV tuners.

s390rtc(4), an RTC driver for the Seiko Instruments S-35390A chip.

Initial implementation of ibmhawk(4) driver for sensors behind the IBM Hawk
on-board Integrated Systems Management Processor found on some eServers.

Tested on an IBM eServer x335.

Add pcf8563rtc(4), yet another I2C real time clock.

branches: 1.31.2; 1.31.4;
Add a generic Motorola/Freescale i2c driver. This was taken from sandpoint
and heavily modified. It works on most Freescale PowerPC and ARM SoCs.

add au8522, xc5k, auvitek config glue

Add options STRTC_NO_USERRAM and STRTC_NO_WATCHDOG for m41t80.

Add G760a fan speed controller driver.

Split spdmem driver into a bus attachment and a common back-end
probe and ROM decode, to follow similar changes made in OpenBSD:

http://article.gmane.org/gmane.os.openbsd.cvs/94948
http://article.gmane.org/gmane.os.openbsd.cvs/94956

There exists at least one alternative attachment (for SGI IP35
systems; see http://article.gmane.org/gmane.os.openbsd.cvs/94947),
and there could be more in the future.

Thanks to Christoph Egger for pointing out the OpenBSD activity.

branches: 1.26.2;
Import smcsmon(4) driver for SMSC LPC47M192 hardware monitor

From Takahiro HAYASHI in PR kern/40420

branches: 1.25.2;
Ooops - sdtemp(4) driver requires sysmon.

Initial implementation of sdtemp(4) driver for on-DIMM temp sensor.

(These optional sensors are specified by JEDEC Standard No. 21-C
Section 4-7 and implemented by multiple vendors. Tested on my
amd64 machine with Kingston KVR1066D3E7S/2G memory which includes
a STMicro STTS424E02 sensor.)

branches: 1.23.6; 1.23.10; 1.23.14;
Add dependency on sysmon_envsys to admtemp.

Ported alipm(4) and admtemp(4) from OpenBSD.

branches: 1.21.2;
Add an i2c attachment for the LM78 family of temp sensor/fan control

Tested by Martin Husemann

Remove chip-specific drivers for ADT7463, ADT7467, and ADM1030; these
have been superseded by the dbcool(4) driver.

Add new driver for dbCool(tm) family of Thermal Monitor and Fan Controller.
Supported chips: ADM1027, ADM1030, ADT7463, ADT7466, ADT7467, ADT7468,
ADT7473, ADT7475, and ADT7476. Notably missing is the ADT7490, and fan
controller support on the ADT7466 is still on the to-do list.

Tested by myself and njoly@
Reviewed by garbled@
Commit approved by christos@, bouyer@, cube@, and matt@

Provide an option I2C_SCAN to enable sanning i2c bus for responses. This
is disabled by default, preserving current behavior.

OK garbled@

allow wildcard for addr so we can have spdmem* at iic? addr ?

branches: 1.16.20; 1.16.24; 1.16.26; 1.16.30;
defflag DEBUG_SGSMIX

branches: 1.15.2;
Add spdmem(4) driver. This decodes technical specifications stored in
the eeprom on common types of memory modules. The specifications are
displayed during boot and can later be queried in the hw.spdmemN sysctl
subtree. Stub driver written by Nicolas Joly and greatly improved upon by
Paul Goyette. From PR 36745, with additional improvements by Paul and me.

branches: 1.14.6; 1.14.14; 1.14.18;
add sgsmix

Provide external functions for setting the LED, rebooting, and powering off
the system.

Microsoft Xbox serial EEPROM driver. Currently reports the system serial
number as sysctl machdep.xbox_serial.

Driver for the Xbox System Management Controller. Currently reports CPU and
motherboard temperatures, but will eventually be extended to replace
arch/i386/xbox/pic16l.S

branches: 1.10.8; 1.10.16;
Oops! ddc.c was accidentally getting included in *all* kernel configs.
Added a new define so it can be included without doing the attach dance.

Add basic DDC (VESA Data Display Channel) driver for use by framebuffers.
Reviewed by jmcneill@ and macallan@.

branches: 1.8.2; 1.8.4;
Add r2025rtc.

branches: 1.7.2;
Add support for i2c bus on AMD-8111 used on many Opteron server motherboards,
and ADT 7463c thermal and voltage monitor found on the Tyan S2881 and S2882-D
(and probably other boards as well). We do not currently support any kind
of detection of the i2c address of the thermal monitor; it appears to be
at 0x2D on the S2881 and 0x2E on the S2882-D (kernel config examples
forthcoming).

From PR kern/32463 submitted by Anil Gopinath, anil_public@yahoo.com.

branches: 1.6.2; 1.6.4; 1.6.6;
merge ktrace-lwp.

Added RICOH RS5C372[AB] Real Time Clock.

added drivers for Analog Devices ADT7467 and ADM1030 thermal monitor / fan controller chips found in various Apple laptops and probably other machines.

branches: 1.3.4; 1.3.16; 1.3.18;
As suggested by Jason Thorpe, rename m41t to m41trtc.

Add xrtc device for XICOR X1226 RTC.

New generic I2C framework. Supports bit-bang and "intelligent" I2C
interface controllers (of varying intelligence levels).

Contributed by Wasabi Systems, Inc. Primarily written by Steve Woodford,
with some modification by me.

A driver for the Aosong AHT20 temperature and humidity sensor. While
slow for an I2C sensor it is inexpensive and should work well enough
in most indoor conditions. All features of the chip are supported.

drm: Use CPPFLAGS.drmkms in all local drm drivers too.

This way we don't pollute the NetBSD kernel namespace with all the
Linux compat shim definitions needed to build drm, except for the
local drm drivers that need the API.

Re-factor and overhaul the "mcp23s17gpio" driver as "mcpgpio", and
add support for 8-bit and I2C variants of the chip:
- MCP23008 / MCP23S08: 8-bit (I2C / SPI)
- MCP23017 / MCP23S17: 16-bit (I2C / SPI)
- MCP23018 / MCP23S18: 16-bit (I2C / SPI), open-drain outputs

The MCP23x17 and MCP23x18 are essentially identical, software-wise; we
merely report different GPIO pin capabilities (no push-pull output for
MCP23x18). Also, remove the tri-state capability that was previously
advertised by the old version of this driver; these chips have no way
to put the pin into a HI-Z mode.

All 3 I2C versions are supported, but the SPI front-end still only
supports the MCP23S17 for now (SPI autoconfiguration needs an overhaul).

mcp23s17gpio(4) remains present as a link to the new mcpgpio(4) man page.

XXX Still to-do: FDT integration, interrupt suppoort.

fix few typos in comments.

A driver and user land utility for the Sparkfun Serial Controlled Motor
Driver module as illustrated here:

https://www.sparkfun.com/products/13911

A SCMD module is a ARM SOC simular to a Arduino in front of a motor
driver chip. The single SCMD module can control two motors and up to
16 additional modules can be chained together using an internal I2C
bus. One can interface with the SCMD using tty uart commands, SPI or
I2C. The driver in this commit adds a kernel driver for the I2C and
SPI interfaces. The command line utility provides a set of
convenience commands that support most of the functions of the SCMD
and is able to use the tty uart mode, SPI user land or the included
kernel driver in a uniform manor.

The use of the SCMD module is mostly for small robots and the like,
but it can control anything that is controllable by voltage.

Driver for the Sensirion SHT30/SHT31/SHT35 temperature and humidity
sensor such as:

https://www.adafruit.com/product/2857

This is a higher priced sensor with a lot of features, including the
ability to do sub-second periodic updates. The driver supports
everything about the sensor except for the alert pin.

A driver for the Sensirion SGP40 MOx gas sensor. An example of this
chip from Adafruit is:

https://www.adafruit.com/product/4829

This is a moderately priced gas sensor that can detect volatile
organic compounds in the air. The driver uses the 3-clause BSD
licensed VOC algorithm provided by Sensirion to turn the raw sensor
metric into a VOC index which can indicate the quality of the air in a
particular indoor environment. All published functions of the chip
are supported and one unpublished feature.

A driver for the Sensirion SHT40/SHT41/SHT45 temperature and humidity
sensor. An example of this chip is:

https://www.adafruit.com/product/4885

This is a lower cost chip that provides higher then usual precision
according to the data sheet. This driver supports all of the published
functions that the chip has.

branches: 1.116.6;
move the fcu driver into arch/macppc where it belongs

branches: 1.115.4;
Rename tsl256x.c -> tsllux.c. No other changes are made by this commit.

Add a driver for NXP PCA954x / PCA984x I2C switch / mux controllers.

Re-factor the "iicmux" driver to support other types of muxes that are
themselves i2c devices.

branches: 1.112.2;
Add a driver for the PCF8574 I/O expander, used as a GPIO in some sparc64
hardware.
The driver currently handles pins configured as LED or INDICATOR and adds
them to the LED and sysmon_envsys subsystems, respectively.

a very preliminary driver for the acclerometer found in later *Books
register definitions from OpenBSD

branches: 1.110.4;
attach LEDs according to info passed as device properties

the beginning of a driver for Philips Semiconductors PCA 9555 and 9556
GPIO controllers, found in Sun Fire v210 and some G5 macs.
Only prints configuration and line status so far.

Clean up gttwsi's register access stuff:
- Garbage-collect the obsolete GTTWSI_ALLWINNER option; it hasn't been
needed since FDT'ization of the Allwinner support code.
- Redefine thw "TWSI_*" register definitions to clearly call out:
-> The Marvell flavor of the offsets
-> The Allwinner flavor of the offsets
...and make the regular definitions indices into a register map.
- Pass the appropriate register map from the front-end to the core.
- Remove the customer register read/write callbacks -- they are no longer
needed now that each front-end passes an appropriate register map to
the core.

branches: 1.107.2;
Add driver for CellWise CW2015 Fuel Gauge IC.

Eliminate all of the #ifdefs for the "strtc" driver. Define model
properties (similar to what the "dsrtc" driver does), and provide
DT compat strings corresponding to those models. Allow config flags
to specify the model for non-FDT platforms (also like "dsrtc").

Add driver for Everest Semi ES8316 Low Power Audio CODEC

Add driver for NXP TDA19988 HDMI encoder

Remove tps65950pm (hardware now supported by twl4030.c)

Add driver for TI TWL4030 Power Management IC

Add FDT support

branches: 1.100.2;
Add a driver for the NXP PCA9685 16-channel, 12-bit PWM Fm+ LED controller.

add i2c attachment for ssdfb

Add basic support for Analogix eDP transmitters. This driver doesn't
know how to mode set yet -- it only knows how to read EDID from a panel.

add options DSRTC_YEAR_START_2K for machines which use 2000 and not 1970
as base to count years from, like Iyonix.
While there apply the offset when writing to the clock as well.

Add driver for Rockchip RK808 Power Management IC.

Add driver for Silergy SY827/SY828 step down regulator.

Add TEA5767 FM radio driver. From Karuna Grewal.

branches: 1.93.2;
Remove the i2c "size" locator and corresponding property / attach arg.
It was a hack meant only for EEPROMs, which have another way to specify
size in the config directive ("flag" paramter), as well as a better way
to detect size based on "compatible" string.

Add a driver for the Taos TSL256x light sensors.

axppmic depends on sysmon_envsys

Rename axp806pmic to axppmic, and add support for AXP803.

Add support for poweroff and the power on-off key (POK).

FDT-ize X-Powers AXP805/806 PMIC driver.

implement fan control, get calibration data from EEPROM via uni_n

yet another temperature sensor / ADC
this one supports Analog Devices AD7417, found in some G5 macs
depends on OpenFirmware for calibration data

preliminary driver for the fan control unit found in some G5

branches: 1.84.2;
Delete 'define dbcool {}' line commented out in previous. It's bogus
and the gcc6 correctly complains about that when it compiles ioconf.c

PR toolchain/53023

Disable the 'define dbcool {}' line - it's not needed, and causes
problems with config(1) and gcc6. See PR toolchain/530223 for more
info.

add driver for Maxim DS1631 High-Precision Digital Thermometer and Thermostat
temperature reading only for now

Driver for EM Microelectronic EM3027 RTC and temperature sensor.

PR/52848: Brad Spencer: Two environment sensor drivers: AM2315 and SI70xx
XXX: Please check that my refactoring did not break them!

Add drivers for HID over I2C devices, and a driver for I2C mices.
From OpenBSD.

Hook axp20x into fdt regulator api

Add driver for Silergy SY8106A regulator

Add GPIO drivers for MAX77620 and TCA9539 as found in Jetson TX1

Instead of a Linux keymap, convert Linux event codes to USB scan codes and
use the ukbd keymaps instead.

Add driver for Texas Instruments TCA8418 I2C Controller Keypad Scan IC.

branches: 1.73.4;
Add LDO6 regulator support.

branches: 1.72.2;
Add 'needs-flag' to tps65217pmic.

For built-in modules, the iic driver requires i2c_bitbang

Create separate modules for i2c_bitbang and bpf_filter so these files
can be included in kernels which need them without also duplicating
them in other modules. Removes the duplicate symbols I found which
prevented loading i2c and bpf modules after having fixed PR 45125.

Add a driver for the ADM1026 Thermal System Management Fan Controller
i2c chip.

add sysmon_wdog dependency to as3722pmic

Add basic driver for AMS AS3722 power management IC

needs-flag for axp20x

Add driver for Texas Instruments TMP451 Temperature Sensor

pcf8653 driver is compatible, delete this driver

add Haoyu Microelectronic HYM8563 RTC driver

Add driver for Active-Semi ACT8846 Power Management controller.

Add driver for X-Powers AC100 integrated audio codec and RTC subsystem.
Only RTC functionality implemented for now.

Add AXP806 and AXP809 power management controller drivers.

Let kernel config override I2C_MAX_ADDR

branches: 1.58.2;
dsrtc depends on sysmon_envsys.

add AXP22x Power Management Unit driver

AXP20x Power Management Unit driver, pretty basic at the moment -- only acts as a temperature sensor

AllWinner implementation uses a different register layout, select it with options GTTWSI_ALLWINNER

branches: 1.54.2;
add HYT-221/271/939 humidity/temperature I2C sensor
extend envsys(4) framework by %rH (relative humidity)

branches: 1.53.2;
Add lmenv to the configuration framework.

Preliminary support for MPL115A2 pressure sensor. It works, but accurracy is
awful.

I should add presure as a new type of sensor to envsys at some point...

Make gttswi MI and usuable from non-Marvell SoCs.
(should rename to mvi2c but ...)

Add driver for Nuvoton W83795G voltage/temp/fan/gpio monitoring device.

As used in the HP Microserver N36L/N40L/N54L:

w83795g* at iic? addr 0x2f
gpio* at gpiobus?

Note that the gpio and watchdog functionality appears to be useless on
the Microserver, as the gpio pins don't affect the LED's and a watchdog
trigger does not cause a reset. Perhaps the reset pin just isn't wired.

There are quite flexible fan control options as well as just monitoring,
but it is not clear to me how best to export that function to userspace.

branches: 1.49.2; 1.49.4;
Add driver for Microchip MCP9800/1/2/3 temperature sensors.

Add minimal support for TPS65217 PMIC as found on BeagleBone. Next step is to
expose regulated voltages through envsys(4).

add support for TPS65950 watchdog timer

TI TPS65950 driver, right now about all it can do is control LEDs

branches: 1.45.6; 1.45.10;
remove Xbox support

branches: 1.44.2;
fix build for kernels with i2c host controller drivers but no iic(4)
driver present

Install dev/i2c/i2c_io.h and implement the API in the iic(4) driver.
Obsolete the I2C_SCAN option as this can now be done from userland.

lg3303 depends on dtv_math, not xc3028

modify the dtv device api so hardware drivers can be loaded independently
of the dtv module

Add Conexant/Samsung CX24227/S5H1409 demodulator subroutines.

Add subroutines to support Microtune MT2131 silicon tuner.

nxt2k depends on firmload

add LGDT3303 tuner and XC3028L demod drivers

Add subdriver for Nextwave (subsequently acquired by ATI, then AMD, and
finally Broadcom) NXT200x series of 8VSB/QAM demodulator.

Still a bit crude and only supports the NXT2004 at this point.

Add subdriver for generic PLL-based TV tuners.

s390rtc(4), an RTC driver for the Seiko Instruments S-35390A chip.

Initial implementation of ibmhawk(4) driver for sensors behind the IBM Hawk
on-board Integrated Systems Management Processor found on some eServers.

Tested on an IBM eServer x335.

Add pcf8563rtc(4), yet another I2C real time clock.

branches: 1.31.2; 1.31.4;
Add a generic Motorola/Freescale i2c driver. This was taken from sandpoint
and heavily modified. It works on most Freescale PowerPC and ARM SoCs.

add au8522, xc5k, auvitek config glue

Add options STRTC_NO_USERRAM and STRTC_NO_WATCHDOG for m41t80.

Add G760a fan speed controller driver.

Split spdmem driver into a bus attachment and a common back-end
probe and ROM decode, to follow similar changes made in OpenBSD:

http://article.gmane.org/gmane.os.openbsd.cvs/94948
http://article.gmane.org/gmane.os.openbsd.cvs/94956

There exists at least one alternative attachment (for SGI IP35
systems; see http://article.gmane.org/gmane.os.openbsd.cvs/94947),
and there could be more in the future.

Thanks to Christoph Egger for pointing out the OpenBSD activity.

branches: 1.26.2;
Import smcsmon(4) driver for SMSC LPC47M192 hardware monitor

From Takahiro HAYASHI in PR kern/40420

branches: 1.25.2;
Ooops - sdtemp(4) driver requires sysmon.

Initial implementation of sdtemp(4) driver for on-DIMM temp sensor.

(These optional sensors are specified by JEDEC Standard No. 21-C
Section 4-7 and implemented by multiple vendors. Tested on my
amd64 machine with Kingston KVR1066D3E7S/2G memory which includes
a STMicro STTS424E02 sensor.)

branches: 1.23.6; 1.23.10; 1.23.14;
Add dependency on sysmon_envsys to admtemp.

Ported alipm(4) and admtemp(4) from OpenBSD.

branches: 1.21.2;
Add an i2c attachment for the LM78 family of temp sensor/fan control

Tested by Martin Husemann

Remove chip-specific drivers for ADT7463, ADT7467, and ADM1030; these
have been superseded by the dbcool(4) driver.

Add new driver for dbCool(tm) family of Thermal Monitor and Fan Controller.
Supported chips: ADM1027, ADM1030, ADT7463, ADT7466, ADT7467, ADT7468,
ADT7473, ADT7475, and ADT7476. Notably missing is the ADT7490, and fan
controller support on the ADT7466 is still on the to-do list.

Tested by myself and njoly@
Reviewed by garbled@
Commit approved by christos@, bouyer@, cube@, and matt@

Provide an option I2C_SCAN to enable sanning i2c bus for responses. This
is disabled by default, preserving current behavior.

OK garbled@

allow wildcard for addr so we can have spdmem* at iic? addr ?

branches: 1.16.20; 1.16.24; 1.16.26; 1.16.30;
defflag DEBUG_SGSMIX

branches: 1.15.2;
Add spdmem(4) driver. This decodes technical specifications stored in
the eeprom on common types of memory modules. The specifications are
displayed during boot and can later be queried in the hw.spdmemN sysctl
subtree. Stub driver written by Nicolas Joly and greatly improved upon by
Paul Goyette. From PR 36745, with additional improvements by Paul and me.

branches: 1.14.6; 1.14.14; 1.14.18;
add sgsmix

Provide external functions for setting the LED, rebooting, and powering off
the system.

Microsoft Xbox serial EEPROM driver. Currently reports the system serial
number as sysctl machdep.xbox_serial.

Driver for the Xbox System Management Controller. Currently reports CPU and
motherboard temperatures, but will eventually be extended to replace
arch/i386/xbox/pic16l.S

branches: 1.10.8; 1.10.16;
Oops! ddc.c was accidentally getting included in *all* kernel configs.
Added a new define so it can be included without doing the attach dance.

Add basic DDC (VESA Data Display Channel) driver for use by framebuffers.
Reviewed by jmcneill@ and macallan@.

branches: 1.8.2; 1.8.4;
Add r2025rtc.

branches: 1.7.2;
Add support for i2c bus on AMD-8111 used on many Opteron server motherboards,
and ADT 7463c thermal and voltage monitor found on the Tyan S2881 and S2882-D
(and probably other boards as well). We do not currently support any kind
of detection of the i2c address of the thermal monitor; it appears to be
at 0x2D on the S2881 and 0x2E on the S2882-D (kernel config examples
forthcoming).

From PR kern/32463 submitted by Anil Gopinath, anil_public@yahoo.com.

branches: 1.6.2; 1.6.4; 1.6.6;
merge ktrace-lwp.

Added RICOH RS5C372[AB] Real Time Clock.

added drivers for Analog Devices ADT7467 and ADM1030 thermal monitor / fan controller chips found in various Apple laptops and probably other machines.

branches: 1.3.4; 1.3.16; 1.3.18;
As suggested by Jason Thorpe, rename m41t to m41trtc.

Add xrtc device for XICOR X1226 RTC.

New generic I2C framework. Supports bit-bang and "intelligent" I2C
interface controllers (of varying intelligence levels).

Contributed by Wasabi Systems, Inc. Primarily written by Steve Woodford,
with some modification by me.

drm: Use CPPFLAGS.drmkms in all local drm drivers too.

This way we don't pollute the NetBSD kernel namespace with all the
Linux compat shim definitions needed to build drm, except for the
local drm drivers that need the API.

Re-factor and overhaul the "mcp23s17gpio" driver as "mcpgpio", and
add support for 8-bit and I2C variants of the chip:
- MCP23008 / MCP23S08: 8-bit (I2C / SPI)
- MCP23017 / MCP23S17: 16-bit (I2C / SPI)
- MCP23018 / MCP23S18: 16-bit (I2C / SPI), open-drain outputs

The MCP23x17 and MCP23x18 are essentially identical, software-wise; we
merely report different GPIO pin capabilities (no push-pull output for
MCP23x18). Also, remove the tri-state capability that was previously
advertised by the old version of this driver; these chips have no way
to put the pin into a HI-Z mode.

All 3 I2C versions are supported, but the SPI front-end still only
supports the MCP23S17 for now (SPI autoconfiguration needs an overhaul).

mcp23s17gpio(4) remains present as a link to the new mcpgpio(4) man page.

XXX Still to-do: FDT integration, interrupt suppoort.

fix few typos in comments.

A driver and user land utility for the Sparkfun Serial Controlled Motor
Driver module as illustrated here:

https://www.sparkfun.com/products/13911

A SCMD module is a ARM SOC simular to a Arduino in front of a motor
driver chip. The single SCMD module can control two motors and up to
16 additional modules can be chained together using an internal I2C
bus. One can interface with the SCMD using tty uart commands, SPI or
I2C. The driver in this commit adds a kernel driver for the I2C and
SPI interfaces. The command line utility provides a set of
convenience commands that support most of the functions of the SCMD
and is able to use the tty uart mode, SPI user land or the included
kernel driver in a uniform manor.

The use of the SCMD module is mostly for small robots and the like,
but it can control anything that is controllable by voltage.

Driver for the Sensirion SHT30/SHT31/SHT35 temperature and humidity
sensor such as:

https://www.adafruit.com/product/2857

This is a higher priced sensor with a lot of features, including the
ability to do sub-second periodic updates. The driver supports
everything about the sensor except for the alert pin.

A driver for the Sensirion SGP40 MOx gas sensor. An example of this
chip from Adafruit is:

https://www.adafruit.com/product/4829

This is a moderately priced gas sensor that can detect volatile
organic compounds in the air. The driver uses the 3-clause BSD
licensed VOC algorithm provided by Sensirion to turn the raw sensor
metric into a VOC index which can indicate the quality of the air in a
particular indoor environment. All published functions of the chip
are supported and one unpublished feature.

A driver for the Sensirion SHT40/SHT41/SHT45 temperature and humidity
sensor. An example of this chip is:

https://www.adafruit.com/product/4885

This is a lower cost chip that provides higher then usual precision
according to the data sheet. This driver supports all of the published
functions that the chip has.

branches: 1.116.6;
move the fcu driver into arch/macppc where it belongs

branches: 1.115.4;
Rename tsl256x.c -> tsllux.c. No other changes are made by this commit.

Add a driver for NXP PCA954x / PCA984x I2C switch / mux controllers.

Re-factor the "iicmux" driver to support other types of muxes that are
themselves i2c devices.

branches: 1.112.2;
Add a driver for the PCF8574 I/O expander, used as a GPIO in some sparc64
hardware.
The driver currently handles pins configured as LED or INDICATOR and adds
them to the LED and sysmon_envsys subsystems, respectively.

a very preliminary driver for the acclerometer found in later *Books
register definitions from OpenBSD

branches: 1.110.4;
attach LEDs according to info passed as device properties

the beginning of a driver for Philips Semiconductors PCA 9555 and 9556
GPIO controllers, found in Sun Fire v210 and some G5 macs.
Only prints configuration and line status so far.

Clean up gttwsi's register access stuff:
- Garbage-collect the obsolete GTTWSI_ALLWINNER option; it hasn't been
needed since FDT'ization of the Allwinner support code.
- Redefine thw "TWSI_*" register definitions to clearly call out:
-> The Marvell flavor of the offsets
-> The Allwinner flavor of the offsets
...and make the regular definitions indices into a register map.
- Pass the appropriate register map from the front-end to the core.
- Remove the customer register read/write callbacks -- they are no longer
needed now that each front-end passes an appropriate register map to
the core.

branches: 1.107.2;
Add driver for CellWise CW2015 Fuel Gauge IC.

Eliminate all of the #ifdefs for the "strtc" driver. Define model
properties (similar to what the "dsrtc" driver does), and provide
DT compat strings corresponding to those models. Allow config flags
to specify the model for non-FDT platforms (also like "dsrtc").

Add driver for Everest Semi ES8316 Low Power Audio CODEC

Add driver for NXP TDA19988 HDMI encoder

Remove tps65950pm (hardware now supported by twl4030.c)

Add driver for TI TWL4030 Power Management IC

Add FDT support

branches: 1.100.2;
Add a driver for the NXP PCA9685 16-channel, 12-bit PWM Fm+ LED controller.

add i2c attachment for ssdfb

Add basic support for Analogix eDP transmitters. This driver doesn't
know how to mode set yet -- it only knows how to read EDID from a panel.

add options DSRTC_YEAR_START_2K for machines which use 2000 and not 1970
as base to count years from, like Iyonix.
While there apply the offset when writing to the clock as well.

Add driver for Rockchip RK808 Power Management IC.

Add driver for Silergy SY827/SY828 step down regulator.

Add TEA5767 FM radio driver. From Karuna Grewal.

branches: 1.93.2;
Remove the i2c "size" locator and corresponding property / attach arg.
It was a hack meant only for EEPROMs, which have another way to specify
size in the config directive ("flag" paramter), as well as a better way
to detect size based on "compatible" string.

Add a driver for the Taos TSL256x light sensors.

axppmic depends on sysmon_envsys

Rename axp806pmic to axppmic, and add support for AXP803.

Add support for poweroff and the power on-off key (POK).

FDT-ize X-Powers AXP805/806 PMIC driver.

implement fan control, get calibration data from EEPROM via uni_n

yet another temperature sensor / ADC
this one supports Analog Devices AD7417, found in some G5 macs
depends on OpenFirmware for calibration data

preliminary driver for the fan control unit found in some G5

branches: 1.84.2;
Delete 'define dbcool {}' line commented out in previous. It's bogus
and the gcc6 correctly complains about that when it compiles ioconf.c

PR toolchain/53023

Disable the 'define dbcool {}' line - it's not needed, and causes
problems with config(1) and gcc6. See PR toolchain/530223 for more
info.

add driver for Maxim DS1631 High-Precision Digital Thermometer and Thermostat
temperature reading only for now

Driver for EM Microelectronic EM3027 RTC and temperature sensor.

PR/52848: Brad Spencer: Two environment sensor drivers: AM2315 and SI70xx
XXX: Please check that my refactoring did not break them!

Add drivers for HID over I2C devices, and a driver for I2C mices.
From OpenBSD.

Hook axp20x into fdt regulator api

Add driver for Silergy SY8106A regulator

Add GPIO drivers for MAX77620 and TCA9539 as found in Jetson TX1

Instead of a Linux keymap, convert Linux event codes to USB scan codes and
use the ukbd keymaps instead.

Add driver for Texas Instruments TCA8418 I2C Controller Keypad Scan IC.

branches: 1.73.4;
Add LDO6 regulator support.

branches: 1.72.2;
Add 'needs-flag' to tps65217pmic.

For built-in modules, the iic driver requires i2c_bitbang